CN105300795A - Method for detecting steel slag product stability - Google Patents
Method for detecting steel slag product stability Download PDFInfo
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- CN105300795A CN105300795A CN201410272822.5A CN201410272822A CN105300795A CN 105300795 A CN105300795 A CN 105300795A CN 201410272822 A CN201410272822 A CN 201410272822A CN 105300795 A CN105300795 A CN 105300795A
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Abstract
The invention provides a method for detecting steel slag product stability. The method comprises the following steps: dividing steel slag product samples to be detected into two groups; carrying out a compression strength test on the first group of steel slag product samples, and recording the result; placing the second group of steel slag product samples into a constant temperature bath for heating, then taking out the steel slag product samples and cooling; repeating the constant temperature bath test for several times, carrying out the compression strength test on the obtained second group of steel slag product samples, and recording the result; comparing the test results of the two groups of steel slag product samples, and judging the steel slag product stability according to the crush, defect and crack situations of the steel slag product samples as well as the strength retention rate of the constant temperature bath. According to the method for detecting steel slag product stability, provided by the invention, the stability of the steel slag product can be directly judged through the strength retention rate of the constant temperature bath, rather than measuring the unstable components respectively in the steel slag. The detection method is simple in operation, and data is accurate and reliable, therefore, the method is worthy of being popularized and applied in actual production.
Description
Technical field
The present invention relates to the technical field of the metallurgical slag being applied to building materials, be specifically related to a kind of detection method of slag goods stability, to detect the safety in utilization of slag building materials goods.
Background technology
At present, slag being applied to building materials field is research topic more popular both at home and abroad.But it is well-known, according to different smelting modes (as ironmaking, steel-making, specifically can be divided into blast furnace, electric furnace, converter etc.), different slag processing mode (as cylinder, hot application, vexed tank etc.), slag can be subdivided into a lot of variety classes.And in the chemical composition of most of slag, all containing free calcium oxide (i.e. f.CaO), this is the difficult problem affecting the utilization of slag effective and safe.Although Domestic Correlative Standard (as GB/T24766-2009, GB/T20491-2006 etc.) stability to slag raw material has requirement, also there is relevant detection method.But even if raw material is qualified, product not necessarily can be qualified, such as, employ slag and flyash in certain product, although their stability all meets respective standard, due to synergistic effect simultaneously, total f.CaO can be very high, and the stability of product can exist hidden danger.
And slag is applied to building materials, mainly other starting material of steel slag instead (as yellow sand, stone etc.) is prepared into product and is used.But, because the building materials standard of current China is set up based on yellow sand, stone, its product stability is not claimed.So, when selecting prepared from steel slag to become product as building materials, there is no related detecting method and the stability of standard to slag goods building materials is effectively passed judgment on.There is huge potential safety hazard in the underproof slag produce of stability, after the use regular hour, can produce the hidden danger such as blast, cracking, have influence on the safety of people due to volumetric expansion.
Further, although can detect the f.CaO affecting concrete quality with reference to detection method in GB GB/T50344-2004 " building structure inspection technical standard ", the method comes with some shortcomings part.First, utilize the method to detect f.CaO content, be difficult to distinguish f.CaO and Ca (OH) from practical operation
2, thus testing result untrue; Secondly, owing to also having f.MgO, RO other labile elements equal to exist in slag, the hazard ratio f.CaO according to the conclusion f.MgO of some experts is larger, and therefore only detecting f.CaO is incomplete on concrete impact.And, show from existing practical study, even if through pretreated slag f.CaO very low (<3%), but after this slag is prepared into concrete product, still may produce the problems such as swelling cracking, its stability is underproof.
Therefore, be necessary to find a kind of new method detecting slag goods stability, the security of slag goods is effectively assessed.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of detection method of slag goods stability, slag to be applied to the stability of building materials problem as principal ingredient is passed judgment on for solving in prior art to lack, there is provided foundation for slag goods are safe and reliable for building industry, improve the security of steel slag utilization.
For achieving the above object, the invention provides a kind of detection method of slag goods stability, comprise the following steps:
Described slag goods refer to: the building materials be made up as raw material of slag or steel-making slag powder, are selected from the one in concrete, water-permeable brick, pavior brick, materials for wall (building block, porous brick).
Described slag goods stability refers to: after the underproof slag of stability in use makes product as raw material, when product is after the use regular hour (latent period may reach even ten several years several years), the hidden danger such as blast, cracking can be produced due to volumetric expansion, have influence on the safety of people, be necessary to carry out check and evaluation to the stability of slag goods.
Described slag is slag that steel plant produce in steel-making (process for making such as converter, electric furnace) process, that produce through Technology of Steel Slag Processing (drum process, hot application method).Concrete, described slag is selected from the one in converter hot splashing slag, converter drum slag, electric furnace roller slag.
Described steel-making slag powder is the micro mist that described slag is formed through magnetic separation, grinding, and its specific surface area is at 350-600kg/m
2, 45 μm tail over≤2%.
1) slag product sample to be measured is divided into 2 groups;
Preferably, described 2 groups of slag product sample are prepared according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ".
Further, the size of the length of described slag product sample, width, height is all less than or equal to 100mm.Concrete, for the principle of test convenience and test unitarity, when a certain item size is greater than 100mm in the length of slag product sample, width, height, this should be cut into 100mm; When in the length of slag product sample, width, height, a certain item size is less than 100mm, be then as the criterion with physical size.Length as slag product sample is 150mm, width is 90mm, highly for 80mm, then sample is cut into 100mm × 90mm × 80mm.
Preferably, the size of the length of described slag product sample, width or height is 100mm, and namely described slag product sample is of a size of 100mm × 100mm × 100mm.
Preferably, described 2 groups of slag product sample refer to in the slag goods of a collection of preparation, randomly draw 6, are divided into 2 groups, often organize 3.
Preferably, described 2 groups of slag product sample carry out standard curing according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ".Further, the described standard curing time is 7 days.
2) compressive strength test is carried out to the 1st group of slag product sample, record result;
Preferably, as step 2) as described in compressive strength test carry out according to the method specified in variety classes slag goods concerned countries standard.Concrete, the method that the compressive strength test of described concrete sample specifies according to standard GB/T/T14902-2012 " ready-mixed concrete " is carried out.The method that the compressive strength test of described water-permeable brick sample specifies according to standard GB/T/T25993-2010 " permeable pavement brick and porous pavement plate " is carried out.The method that the compressive strength test of described pavior brick sample specifies according to standard GB/T 28635-2012 " concrete road pavement brick " is carried out.The method that the compressive strength test of described materials for wall-building block sample specifies according to standard GB/T 8239-1997 " normal concrete small hollow block " is carried out.The method that the compressive strength test of described materials for wall-porous brick sample specifies according to industry standard JC943-2004 " concrete perforated brick " is carried out.
Preferably, described record result refers to the result d of record compressive strength test
0.
Preferably, described compressive strength test adopts pressure testing machine to measure.Concrete, described pressure testing machine is YAW-2000 type full-automatic pressure testing machine.
3), after the 2nd group of slag product sample being put into water bath with thermostatic control heating, take out, cool;
Preferably, described water bath with thermostatic control, can the multiple sample of parallel placement for having larger volume, and can continue the water bath with thermostatic control keeping suitable water temperature for a long time.Concrete, described water bath with thermostatic control is SY-84 type cement rapid curing constant water bath box.
Preferably, described 2nd group of slag product sample is put into water bath with thermostatic control and is wanted immersion water.Concrete, refer in described immersion water in the complete immersion water of described slag product sample.
Preferably, the concrete heating condition of described water bath with thermostatic control is: temperature is 77-83 DEG C, and the time keeps 5.5-6.5 hour, is preferably 6 hours.
Preferably, nature cooling is cooled to described in.
4) repeat step 3) repeatedly after, by gained the 2nd group of slag product sample, then carry out compressive strength test, record result;
Preferably, as step 4) as described in multiplicity be 9 times, 1 times/day.
Preferably, as step 4) as described in the Methods and steps 2 of compressive strength test) as described in the method for compressive strength test identical.
Preferably, described record result refers to the result d of record compressive strength test
10.
5) test findings of 2 groups of slag product sample is compared, according to situation and the water bath with thermostatic control strength retention ratio judgement slag goods stability of slag product sample generation fragmentation, defect, cracking.
Preferably, as step 5) as described in slag product sample occur fragmentation, defect, cracking situation, directly carry out judgement slag goods stability.
Preferably, as step 5) as described in slag product sample there is not the situation of fragmentation, defect, cracking, calculate according to water bath with thermostatic control strength retention ratio and judge slag goods stability.
Further, described water bath with thermostatic control strength retention ratio calculates as follows:
ω＝d
10/d
0×100％；
In formula:
ω---water bath with thermostatic control strength retention ratio, %;
D
10---carry out the compressive strength of the rear slag product sample of water bath with thermostatic control test, MPa;
D
0---do not carry out the compressive strength of the slag product sample of water bath with thermostatic control test, MPa.
When described water bath with thermostatic control strength retention ratio ω value is larger, slag goods stability is better.
Described water bath with thermostatic control strength retention ratio gets the mean value of 3 parallel experiment results as test findings, and result of calculation is accurate to 0.1%.The described numerical value revision of the convention is undertaken by the regulation of GB/T8170-2008 " rules of rounding off for numerical values & expression and judgement of limiting values ".
A detection method for slag goods stability, is detecting the application in concrete, water-permeable brick, pavior brick, materials for wall (building block, porous brick) stability.
As mentioned above, the detection method of a kind of slag goods stability provided by the invention, has following beneficial effect:
1. the detection method of a kind of slag goods stability provided by the invention, effectively the stability of slag goods can be judged by quantitative and qualitative analysis by detecting water bath with thermostatic control strength retention ratio, according to sample whether occur fragmentation, defect, cracking situation carry out qualitative analysis, quantitatively calculate according to water bath with thermostatic control strength retention ratio, for the safe handling of slag goods provide intuitively, conveniently judgment basis and safety guarantee.
2. the detection method of a kind of slag goods stability provided by the invention, without the need to labile element concrete in slag, measure respectively as f.CaO, f.MgO, RO are equal, just directly can calculate by water bath with thermostatic control strength retention ratio the stability judging slag goods.
3. the detection method of a kind of slag goods stability provided by the invention, simple to operate, detection time is short, data accurately and reliably, be applicable to the Detection of Stability of concrete, prevailing roadway brick, water-permeable brick, materials for wall (building block, porous brick) multiple slag goods, highly apply in actual production.
Accompanying drawing explanation
Fig. 1 is shown as the schematic flow sheet of the detection method of a kind of slag goods stability of the present invention
Embodiment
Set forth the present invention further below in conjunction with specific embodiment, should be understood that these embodiments are only not used in for illustration of the present invention and limit the scope of the invention.
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this instructions can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this instructions also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
The material that following examples use, equipment are as follows:
1, material
Converter hot splashing slag, converter drum slag, electric furnace roller slag (slag, steel-making slag powder, upper Hypon smelting slag comprehensive exploitation Industrial Co., Ltd.); Cement (P.O42.5 class g cement, Shanghai sea dog Cement Group company limited); Flyash (II level flyash, Huaneng Group power plant); Breeze (S95 breeze, upper Hypon field building material company); Gypsum (II level muriacite, Heng Tai Gypsum Company); Aggregate chips (particle diameter≤3mm, Deqing, Zhejiang building stones company); Water (tap water)
2, equipment
SY-84 type cement rapid curing constant water bath box (Wuxi Jianyi Instrument Machinery Co., Ltd.); YAW-2000 type full-automatic pressure testing machine (Shaoxing Kente Mechanical & Electrical Co., Ltd.)
Embodiment 1
Prepare slag goods-water-permeable brick sample 1-4 according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", in water-permeable brick sample 1-4, component match ratio is slag: cement: water=4.5:1:0.4.Wherein, slag is selected from the Baosteel company converter hot splashing slag that hot application technique produces in different times convertor steelmaking process in 2014 respectively.Respectively water-permeable brick sample 1-4 is often planted and prepare 6, be divided into 2 groups, often organize 3.
Prepare water-permeable brick sample 1-4, when a certain item size is greater than 100mm in the length of water-permeable brick sample 1-4, width, height, this should be cut into 100mm; When in the length of water-permeable brick sample 1-4, width, height, a certain item size is less than 100mm, be then as the criterion with physical size.
Respectively 2 of water-permeable brick sample 1-4 groups of 6 water-permeable brick samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 the water-permeable brick samples getting water-permeable brick sample 1-4 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that standard GB/T/T25993-2010 " permeable pavement brick and porous pavement plate " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of water-permeable brick sample 1-4 the group of 3 water-permeable brick sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 5.5-6.5 hour, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of water-permeable brick sample respectively, then carry out compressive strength test, record result d
10.
When the 1st group of water-permeable brick sample is after compressive strength test, there is the situation of fragmentation, defect, cracking, illustrate that this slag goods-water-permeable brick product quality is defective.
When the 2nd group of water-permeable brick sample is after water bath with thermostatic control heating, compressive strength test, there is the situation of fragmentation, defect, cracking, directly judge that this slag goods-water-permeable brick stability is defective.
When the 2nd group of water-permeable brick sample is after water bath with thermostatic control, compressive strength test, there is not the situation of fragmentation, defect, cracking.According to the test findings of 2 groups of water-permeable brick samples, by water bath with thermostatic control strength retention ratio computing formula ω=d
10/ d
0× 100% calculates.Water bath with thermostatic control strength retention ratio gets the mean value of 3 parallel experiment results as test findings, and result of calculation is accurate to 0.1%.When water bath with thermostatic control strength retention ratio ω value is larger, slag goods-water-permeable brick stability is better.Concrete data are in table 1.
The determination of stability result table of table 1 water-permeable brick sample 1-4
As shown in Table 1, the water bath with thermostatic control strength retention ratio ω value of water-permeable brick sample 1 is maximum, and the stability of its product is best.When water bath with thermostatic control strength retention ratio ω value is more than 80%, as water-permeable brick sample 1-2, the stability of product is better; When water bath with thermostatic control strength retention ratio ω value lower than 80% time, as water-permeable brick sample 3, the stability of product is relatively poor.And water-permeable brick sample 4 is after water bath with thermostatic control, compressive strength test, sample occurs broken, and the stability extreme difference of this product is described, compressive strength is 0, directly can judge defective.And after using a period of time through reality, water-permeable brick sample 1-2 product stability is still good, and can there is the phenomenons such as cracking in water-permeable brick sample 4 product, poor stability.As can be seen here, there is huge difference in the stability of slag goods-water-permeable brick that prepared by the same composition of different batches.
Embodiment 2
Prepare slag goods-concrete sample 1 according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", in concrete sample 1, component match ratio is slag: cement: flyash: water=2100:260:100:180.Slag is selected from the Baosteel company converter hot splashing slag that hot application technique produces in convertor steelmaking process in 2014.
Wherein, slag and flyash, as raw material, are tested with regard to its stability respectively, and slag is tested according to standard GB/T/T24766-2009 " asphalt paving slag ", GB/T20491-2006 " steel-making slag powder in cement and concrete "; Flyash is tested according to standard GB/T/T1596-2005 " flyash in cement and concrete ".Slag and flyash are as raw material, and after tested, it has good stability, qualified.
Respectively concrete sample 1 is prepared 6, be divided into 2 groups, often organize 3.Prepare concrete sample 1 and be of a size of 100mm × 100mm × 100mm.Respectively 2 of concrete sample 1 groups of 6 concrete samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 concrete samples getting concrete sample 1 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that standard GB/T/T14902-2012 " ready-mixed concrete " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of concrete sample 1 the group of 3 concrete sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 6 hours, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of concrete sample respectively, then carry out compressive strength test, record result d
10.
When the 1st group of concrete sample is after compressive strength test, there is the situation of fragmentation, defect, cracking, illustrate that this slag goods-concrete product is off quality.
When the 2nd group of concrete sample is after water bath with thermostatic control heating, compressive strength test, there is the situation of fragmentation, defect, cracking, directly judge that this slag goods-concrete stability is defective.
When the 2nd group of concrete sample is after water bath with thermostatic control, compressive strength test, there is not the situation of fragmentation, defect, cracking.According to the test findings of 2 groups of concrete samples, by water bath with thermostatic control strength retention ratio computing formula ω=d
10/ d
0× 100% calculates.Water bath with thermostatic control strength retention ratio gets the mean value of 3 parallel experiment results as test findings, and result of calculation is accurate to 0.1%.When water bath with thermostatic control strength retention ratio ω value is larger, slag goods-concrete stability is better.Concrete data are in table 2.
The determination of stability result table of table 2 concrete sample 1
As shown in Table 2, concrete sample 1 is after water bath with thermostatic control, compressive strength test, and sample occurs broken, and the stability extreme difference of this product is described, compressive strength is 0, directly can judge defective.And after using a period of time through reality, there is cracking phenomena in concrete sample 1 product, poor stability.As can be seen here, though as the slag of raw material and the stability of flyash all qualified separately, but when being prepared into concrete also there is defective phenomenon in stability.
Embodiment 3
Prepare slag goods-concrete sample 2-4 according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", in concrete sample 2-4, component match ratio is slag: cement: water=2100:360:180.Wherein, slag is selected from the converter drum slag that Baosteel company produces different times convertor steelmaking process intermediate roll technique in 2014 respectively.Respectively concrete sample 2-4 is often planted and prepare 6, be divided into 2 groups, often organize 3.Prepare the size of concrete sample 2-4 with embodiment 2.
Respectively 2 of concrete sample 2-4 groups of 6 concrete samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 concrete samples getting concrete sample 2-4 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that standard GB/T/T14902-2012 " ready-mixed concrete " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of concrete sample 2-4 the group of 3 concrete sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 6 hours, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of concrete sample respectively, then carry out compressive strength test, record result d
10.
The determination of stability method of concrete sample 2-4 is with embodiment 2.Concrete data are in table 3.
The determination of stability result table of table 3 concrete sample 2-4
As shown in Table 3, the water bath with thermostatic control strength retention ratio ω value of concrete sample 2 is maximum, and the stability of its product is best.When water bath with thermostatic control strength retention ratio ω value is more than 80%, as concrete sample 2-3, the stability of product is better; When water bath with thermostatic control strength retention ratio ω value lower than 80% time, as concrete sample 4, the stability of product is relatively poor.And after using a period of time through reality, concrete sample 2-3 product stability is still good.As can be seen here, there is huge difference in slag goods-concrete stability that prepared by the same composition of different batches.
Embodiment 4
Slag goods-pavior brick sample 1-4 is prepared according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ".In pavior brick sample 1-4, component match ratio is Binder Materials: aggregate chips=1:4, and wherein Binder Materials by percentage to the quality, comprises following component: steel-making slag powder 42%; Breeze 52%; Gypsum 6%.Wherein, steel-making slag powder is selected from the electric furnace roller slag that Baosteel company produces different times EAF Steelmaking Process intermediate roll technique in 2014 respectively.Respectively pavior brick sample 1-4 is often planted and prepare 6, be divided into 2 groups, often organize 3.
Prepare same above-described embodiment of size of pavior brick sample 1-4.
Respectively 2 of pavior brick sample 1-4 groups of 6 pavior brick samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 the pavior brick samples getting pavior brick sample 1-4 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that standard GB/T 28635-2012 " concrete road pavement brick " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of pavior brick sample 1-4 the group of 3 pavior brick sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 6 hours, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of pavior brick sample respectively, then carry out compressive strength test, record result d
10.
Same above-described embodiment of determination of stability method of pavior brick sample 1-4.Concrete data are in table 4.
As shown in Table 4, the water bath with thermostatic control strength retention ratio ω value of pavior brick sample 1 is maximum, and the stability of its product is best.When water bath with thermostatic control strength retention ratio ω value is more than 80%, as pavior brick sample 1-2, the stability of product is better; When water bath with thermostatic control strength retention ratio ω value lower than 80% time, as pavior brick sample 3, the stability of product is relatively poor.And pavior brick sample 4 is after water bath with thermostatic control, compressive strength test, sample occurs broken, and the stability extreme difference of this product is described, compressive strength is 0, directly can judge defective.And after using a period of time through reality, pavior brick sample 1-2 product stability is still good, and can there is the phenomenons such as cracking in pavior brick sample 4 product, poor stability.As can be seen here, there is huge difference in the stability of slag goods-pavior brick that prepared by the same composition of different batches.
The determination of stability result table of table 4 pavior brick sample 1-4
Embodiment 5
Prepare slag goods-building block (materials for wall) sample 1-4 according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", in building block sample 1-4, component match ratio is steel-making slag powder: breeze: cement: gypsum: aggregate chips: flyash: water=30; 50:14:6:650:15:20.Wherein, steel-making slag powder is selected from the Baosteel company converter hot splashing slag that hot application technique produces in different times convertor steelmaking process in 2014 respectively.Respectively building block sample 1-4 is often planted and prepare 6, be divided into 2 groups, often organize 3.Same above-described embodiment of size of preparation building block sample 1-4.
Respectively 2 of building block sample 1-4 groups of 6 building block samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 the building block samples getting building block sample 1-4 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that standard GB/T 8239-1997 " normal concrete small hollow block " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of building block sample 1-4 the group of 3 building block sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 6 hours, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of building block sample respectively, then carry out compressive strength test, record result d
10.
Same above-described embodiment of determination of stability method of building block sample 1-4.Concrete data are in table 5.
The determination of stability result table of table 5 building block sample 1-4
As shown in Table 5, the water bath with thermostatic control strength retention ratio ω value of building block sample 1 is maximum, and the stability of its product is best.When water bath with thermostatic control strength retention ratio ω value is more than 80%, as building block sample 1-2, the stability of product is better; When water bath with thermostatic control strength retention ratio ω value lower than 80% time, as building block sample 3, the stability of product is relatively poor.And building block sample 4 is after water bath with thermostatic control, compressive strength test, sample occurs broken, and the stability extreme difference of this product is described, compressive strength is 0, directly can judge defective.And after using a period of time, building block sample 1-2 product stability is still good, and can there is the phenomenons such as cracking in building block sample 4 product, poor stability.As can be seen here, there is huge difference in the stability of slag goods-building block (materials for wall) that prepared by the same composition of different batches.
Embodiment 6
Prepare slag goods-porous brick (materials for wall) sample 1-4 according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", in porous brick sample 1-4, component match ratio is steel-making slag powder: breeze: cement: gypsum: aggregate chips: flyash: water=30; 50:14:6:650:15:20.Wherein, steel-making slag powder is selected from the converter drum slag that Baosteel company produces different times convertor steelmaking process intermediate roll technique in 2014 respectively.Respectively porous brick sample 1-4 is often planted and prepare 6, be divided into 2 groups, often organize 3.Prepare same above-described embodiment of size of porous brick sample 1-4.
Respectively 2 of porous brick sample 1-4 groups of 6 porous brick samples are carried out standard curing 7 days according to standard GB/T/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " regulation, take out stand-by.
The 1st group of 3 the porous brick samples getting porous brick sample 1-4 adopt YAW-2000 type full-automatic pressure testing machine to carry out compressive strength test, record result d according to the method that industry standard JC943-2004 " concrete perforated brick " specifies
0.
Same SY-84 type cement rapid curing constant water bath box is put into, in immersion water respectively by parallel for the 2nd of porous brick sample 1-4 the group of 3 porous brick sample; Water bath with thermostatic control be heated to 77-83 DEG C and after keeping 6 hours, stop heating, taking out and naturally cool, to repeat sample in water bath with thermostatic control heating, take out, cool, multiplicity is 10 times, 1 times/day.After carrying out 10 days, take out the 2nd group of porous brick sample respectively, then carry out compressive strength test, record result d
10.
Same above-described embodiment of determination of stability method of porous brick sample 1-4.Concrete data are in table 6.
The determination of stability result table of table 6 porous brick sample 1-4
As shown in Table 6, the water bath with thermostatic control strength retention ratio ω value of porous brick sample 1 is maximum, and the stability of its product is best.When water bath with thermostatic control strength retention ratio ω value is more than 80%, as porous brick sample 1-2, the stability of product is better; When water bath with thermostatic control strength retention ratio ω value lower than 80% time, as porous brick sample 3, the stability of product is relatively poor.And porous brick sample 4 is after water bath with thermostatic control, compressive strength test, sample occurs broken, and the stability extreme difference of this product is described, compressive strength is 0, directly can judge defective.And after using a period of time, porous brick sample 1-2 product stability is still good, and can there is the phenomenons such as cracking in porous brick sample 4 product, poor stability.As can be seen here, there is huge difference in the stability of slag goods-porous brick (materials for wall) that prepared by the same composition of different batches.
In sum, the detection method of a kind of slag goods stability provided by the invention, can the stability of effective rational judgment slag goods, provides foundation, improve the security of steel slag utilization for slag goods are safe and reliable for building industry.Further, without the need to labile element concrete in slag, measure respectively as f.CaO, f.MgO, RO are equal, just directly can judge the stability of slag goods by water bath with thermostatic control strength retention ratio, simple to operate, data accurately and reliably.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (9)
1. a detection method for slag goods stability, is characterized in that, comprises the following steps:
1) slag product sample to be measured is divided into 2 groups;
2) compressive strength test is carried out to the 1st group of slag product sample, record result;
3), after the 2nd group of slag product sample being put into water bath with thermostatic control heating, take out, cool;
4) repeat step 3) repeatedly after, by gained the 2nd group of slag product sample, then carry out compressive strength test, record result;
5) test findings of 2 groups of slag product sample is compared, according to situation and the water bath with thermostatic control strength retention ratio judgement slag goods stability of slag product sample generation fragmentation, defect, cracking.
2. the detection method of a kind of slag goods stability according to claim 1, it is characterized in that, described slag goods are the building materialss be made up as raw material of slag or steel-making slag powder, are selected from the one in concrete, water-permeable brick, pavior brick, materials for wall.
3. the detection method of a kind of slag goods stability according to claim 2, it is characterized in that, described slag is selected from the one in converter hot splashing slag, converter drum slag, electric furnace roller slag; Described steel-making slag powder is the micro mist that described slag is formed through magnetic separation, grinding, and its specific surface area is at 350-600kg/m
2, 45 μm tail over≤2%.
4. the detection method of a kind of slag goods stability according to claim 1, it is characterized in that, as step 1) as described in slag product sample be prepared according to standard GB/T/T50081-2002 standard for test methods of mechanical properties of ordinary concrete, standard curing.
5. the detection method of a kind of slag goods stability according to claim 4, it is characterized in that, the described standard curing time is 7 days.
6. the detection method of a kind of slag goods stability according to claim 1, is characterized in that, as step 3) as described in the concrete heating condition of water bath with thermostatic control be: temperature is 77-83 DEG C, and the time keeps 5.5-6.5 hour; Described 2nd group of slag product sample is put into water bath with thermostatic control and is wanted immersion water; The described nature that is cooled to cools.
7. the detection method of a kind of slag goods stability according to claim 1, is characterized in that, as step 4) as described in multiplicity be 9 times, 1 times/day.
8. the detection method of a kind of slag goods stability according to claim 1, is characterized in that, as step 5) as described in water bath with thermostatic control strength retention ratio computing formula be: ω=d
10/ d
0× 100%; Wherein, ω is water bath with thermostatic control strength retention ratio, %; d
0for carrying out the compressive strength of the rear slag product sample of water bath with thermostatic control test, MPa; d
10for not carrying out the compressive strength of the slag product sample of water bath with thermostatic control test, MPa.
9. detecting the application in concrete, water-permeable brick, pavior brick, materials for wall stability according to the detection method of the arbitrary described a kind of slag goods stability of claim 1-8.
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| CN109443967A (en) * | 2018-12-14 | 2019-03-08 | 武汉理工大学 | A kind of evaluation method of slag as aggregate stability |
| CN113670764A (en) * | 2021-07-27 | 2021-11-19 | 宝武环科武汉金属资源有限责任公司 | Hydrothermal accelerated experiment method for batch safety detection of stability of steel slag granules |
| CN115034079A (en) * | 2022-06-23 | 2022-09-09 | 中冶检测认证有限公司 | Method for determining safety of concrete structure containing steel slag aggregate |
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| CN109443967A (en) * | 2018-12-14 | 2019-03-08 | 武汉理工大学 | A kind of evaluation method of slag as aggregate stability |
| CN113670764A (en) * | 2021-07-27 | 2021-11-19 | 宝武环科武汉金属资源有限责任公司 | Hydrothermal accelerated experiment method for batch safety detection of stability of steel slag granules |
| CN113670764B (en) * | 2021-07-27 | 2024-03-15 | 宝武环科武汉金属资源有限责任公司 | Hydrothermal acceleration experiment method for safely detecting stability of steel slag particles in batches |
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